/* ============================================
   FRIENDSHIP DAY — for Anurag
   Tokens
   ============================================ */
:root {
  --color-bg:          #ffffff;
  --color-cream:       #fffaf3;
  --color-green:       #cfe8d6;
  --color-green-soft:  #e7f4ea;
  --color-green-dark:  #5f9f80;
  --color-orange:      #ffd9ae;
  --color-orange-soft: #fff1de;
  --color-orange-dark: #ef9d51;
  --color-text:        #3d3a35;
  --color-text-soft:   #857f77;

  --font-display: 'Caveat', cursive;
  --font-body: 'Quicksand', sans-serif;

  --radius-lg: 28px;
  --radius-md: 18px;
  --shadow-soft: 0 20px 45px -20px rgba(95, 159, 128, 0.35);
  --ease-smooth: cubic-bezier(.22, 1, .36, 1);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  min-height: 100%;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  overflow-x: hidden;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

h1, h2 { font-family: var(--font-display); font-weight: 700; margin: 0; }
p { margin: 0; }

/* Background wash — soft green-to-orange breathing gradient */
body {
  background: radial-gradient(circle at 20% 10%, var(--color-green-soft) 0%, transparent 45%),
              radial-gradient(circle at 85% 85%, var(--color-orange-soft) 0%, transparent 50%),
              var(--color-bg);
}

/* ============================================
   Layout — pages
   ============================================ */
#app {
  position: relative;
  min-height: 100vh;
  width: 100%;
}

.page {
  display: none;
  min-height: 100vh;
  width: 100%;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px 20px 56px;
  position: relative;
  opacity: 0;
  text-align: center;
}

.page.active {
  display: flex;
  animation: pageFadeIn 0.7s var(--ease-smooth) forwards;
}

.page.leaving {
  animation: pageFadeOut 0.5s var(--ease-smooth) forwards;
}

@keyframes pageFadeIn {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes pageFadeOut {
  from { opacity: 1; transform: translateY(0); }
  to   { opacity: 0; transform: translateY(-14px); }
}

/* ============================================
   PAGE 1 — Welcome / Envelope
   ============================================ */
.page--welcome { cursor: pointer; gap: 28px; }

.doodle {
  position: absolute;
  font-size: 34px;
  opacity: 0.5;
  animation: sway 6s ease-in-out infinite;
}
.doodle--leaf-1 { top: 8%; left: 8%; animation-delay: 0s; }
.doodle--leaf-2 { bottom: 10%; right: 8%; animation-delay: 1.5s; transform: scaleX(-1); }

@keyframes sway {
  0%, 100% { transform: rotate(-6deg) translateY(0); }
  50%      { transform: rotate(6deg) translateY(-8px); }
}

.envelope-scene {
  position: relative;
  width: min(320px, 80vw);
  height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.envelope {
  position: relative;
  width: 100%;
  height: 190px;
  perspective: 1200px;
}

.envelope__shadow {
  position: absolute;
  bottom: -18px;
  left: 10%;
  width: 80%;
  height: 22px;
  background: radial-gradient(ellipse at center, rgba(95,159,128,0.25) 0%, transparent 70%);
  filter: blur(2px);
}

.envelope__body {
  position: absolute;
  inset: 0;
  background: var(--color-orange);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}
.envelope__body::before {
  /* subtle hand-drawn paper texture lines */
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.25) 0%, transparent 40%);
}

.envelope__seal {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 44px;
  height: 44px;
  transform: translate(-50%, -50%);
  z-index: 3;
  filter: drop-shadow(0 3px 4px rgba(0,0,0,0.12));
  transition: opacity 0.3s ease;
}
.envelope__seal svg { width: 100%; height: 100%; }

.envelope__flap {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 55%;
  background: var(--color-orange-dark);
  clip-path: polygon(0 0, 100% 0, 50% 100%);
  transform-origin: top;
  transform: rotateX(0deg);
  transition: transform 0.8s var(--ease-smooth);
  z-index: 2;
}

.envelope__letter {
  position: absolute;
  left: 6%;
  bottom: 8%;
  width: 88%;
  min-height: 60%;
  background: var(--color-cream);
  border-radius: var(--radius-md) var(--radius-md) 6px 6px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  padding: 22px 18px 18px;
  transform: translateY(6%);
  opacity: 0;
  transition: transform 0.7s 0.15s var(--ease-smooth), opacity 0.5s 0.15s ease;
  z-index: 1;
}

/* Open state, toggled via JS with .is-open on #envelope */
.envelope.is-open .envelope__flap {
  transform: rotateX(180deg);
  z-index: 0;
}
.envelope.is-open .envelope__seal { opacity: 0; }
.envelope.is-open .envelope__letter {
  transform: translateY(-58%);
  opacity: 1;
  z-index: 3;
}

.letter__greeting {
  font-family: var(--font-display);
  font-size: clamp(22px, 6vw, 28px);
  font-weight: 600;
  color: var(--color-orange-dark);
}
.letter__body {
  font-size: clamp(13px, 3.6vw, 15px);
  color: var(--color-text);
  margin-top: 8px;
  line-height: 1.5;
}
.letter__signoff {
  font-family: var(--font-display);
  font-size: clamp(18px, 5vw, 22px);
  color: var(--color-green-dark);
  margin-top: 10px;
}

.tap-hint {
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--color-text-soft);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 0.5; }
  50%      { opacity: 1; }
}

/* Envelope gentle idle bob before opening */
.envelope-scene { animation: bob 3.4s ease-in-out infinite; }
@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-6px); }
}

/* ============================================
   PAGE 2 — Memories
   ============================================ */
.page--memories { gap: 18px; padding-top: 48px; }

.balloon-scene {
  width: 100%;
  display: flex;
  justify-content: center;
  margin-bottom: 4px;
}

.balloon {
  position: relative;
  width: 120px;
  animation: floatBalloon 5s ease-in-out infinite;
}
.balloon__svg { width: 100%; height: auto; display: block; }
.balloon__basket-heart {
  position: absolute;
  left: 50%;
  top: 82%;
  transform: translate(-50%, -50%);
  font-size: 12px;
  animation: heartBeat 1.8s ease-in-out infinite;
}

@keyframes floatBalloon {
  0%, 100% { transform: translateY(0) rotate(-2deg); }
  50%      { transform: translateY(-16px) rotate(2deg); }
}
@keyframes heartBeat {
  0%, 100% { transform: translate(-50%, -50%) scale(1); }
  50%      { transform: translate(-50%, -50%) scale(1.2); }
}

.page-heading {
  font-size: clamp(34px, 9vw, 48px);
  color: var(--color-green-dark);
}

.page-copy {
  max-width: 540px;
  font-size: clamp(14px, 3.6vw, 16px);
  line-height: 1.7;
  color: var(--color-text-soft);
  margin-top: 4px;
}

.video-section {
  width: 100%;
  max-width: 560px;
  margin-top: 18px;
  background: var(--color-cream);
  border-radius: var(--radius-lg);
  padding: 24px 18px;
  box-shadow: var(--shadow-soft);
}

.video-heading {
  font-size: clamp(22px, 5.5vw, 26px);
  color: var(--color-orange-dark);
  margin-bottom: 14px;
}

.video-frame {
  position: relative;
  width: 100%;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-green-soft);
}

#friendshipVideo {
  width: 100%;
  display: block;
  border-radius: var(--radius-md);
  background: #000;
}

.video-fallback {
  display: none;
  padding: 30px 16px;
  font-size: 13px;
  color: var(--color-text-soft);
}
.video-frame.no-video #friendshipVideo { display: none; }
.video-frame.no-video .video-fallback { display: block; }

.btn-continue {
  margin-top: 22px;
  border: none;
  cursor: pointer;
  background: var(--color-green-dark);
  color: #fff;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15px;
  padding: 13px 30px;
  border-radius: 999px;
  box-shadow: 0 12px 24px -10px rgba(95,159,128,0.55);
  transition: transform 0.25s var(--ease-smooth), box-shadow 0.25s ease;
}
.btn-continue:hover { transform: translateY(-2px); box-shadow: 0 16px 28px -10px rgba(95,159,128,0.6); }
.btn-continue:active { transform: translateY(0); }
.btn-continue span { display: inline-block; transition: transform 0.25s ease; }
.btn-continue:hover span { transform: translateX(4px); }

/* ============================================
   PAGE 3 — Final Wish
   ============================================ */
.page--final { padding-top: 40px; }

.final-card {
  position: relative;
  max-width: 560px;
  width: 100%;
  background: var(--color-cream);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  padding: clamp(30px, 7vw, 52px) clamp(22px, 6vw, 44px);
}

.final-card__doodle {
  font-size: 34px;
  margin-bottom: 6px;
}

.final-heading {
  font-size: clamp(30px, 7.5vw, 42px);
  color: var(--color-orange-dark);
  line-height: 1.2;
}

.final-message {
  margin-top: 20px;
  font-size: clamp(14px, 3.8vw, 16.5px);
  line-height: 1.85;
  color: var(--color-text);
}

.final-footer {
  margin-top: 28px;
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--color-green-dark);
}

.heart-inline { display: inline-block; animation: heartBeat 1.6s ease-in-out infinite; }

/* ============================================
   Floating hearts (global, behind content)
   ============================================ */
#floating-hearts {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
}

.floating-heart {
  position: absolute;
  bottom: -40px;
  font-size: 18px;
  opacity: 0.85;
  animation-name: floatUp;
  animation-timing-function: linear;
  animation-fill-mode: forwards;
  will-change: transform, opacity;
}

@keyframes floatUp {
  0%   { transform: translateY(0) translateX(0) rotate(0deg); opacity: 0; }
  10%  { opacity: 0.9; }
  100% { transform: translateY(-110vh) translateX(var(--drift, 20px)) rotate(360deg); opacity: 0; }
}

.page, .video-section, .envelope-scene, .final-card { position: relative; z-index: 1; }

/* ============================================
   Music toggle
   ============================================ */
#music-toggle {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 20;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: none;
  background: var(--color-cream);
  color: var(--color-green-dark);
  box-shadow: var(--shadow-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.25s ease, color 0.25s ease;
}
#music-toggle:hover { transform: scale(1.06); }
#music-toggle svg { width: 20px; height: 20px; }
#music-toggle.is-playing { color: var(--color-orange-dark); }

/* ============================================
   Responsive tweaks
   ============================================ */
@media (min-width: 640px) {
  .page { padding: 48px 24px 72px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}